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Appendix C
Page 123
Programming Features
Data Logging Memory Allocation Options
The 980 Flow Meter uses a management scheme called “Dynamic Memory
Allocation.” All readings are logged in battery-backed Random Access
Memory (RAM). RAM memory is allocated to each channel dynamically
during operation. If one channel is logging at 5-minute intervals and a second
channel logging at 1-minute intervals, the meter automatically configures
memory so that both channels fill memory at the same time. Five times as
much memory is assigned to the channel that is logging at 1-minute intervals
than the channel that is logging at 5-minute intervals.
Wrap Memory Mode
The 980 Flow Meter uses wrap memory. In Wrap mode, when memory
becomes full, the oldest reading is discarded each time a new reading is
taken. When memory becomes full, the flow meter continues to operate and
log data. This mode is best used to receive the most recent data readings.
Datalogging Configurations
To configure the 980 Flow Meter for data logging:
1. From the Main Menu, select
OPTIONS>ADVANCED OPTIONS> DATA LOG.
2. HIghlight
SELECT INPUTS using the up and down soft arrow soft keys,
then press the
SELECT soft key to continue.
3. Highlight the channel you wish to log using the up and down arrow soft
keys. Certain channels require more information, refer to
4. Select Logged or Not-Logged using the
CHANGE CHOICE soft key. Press
the
ACCEPT soft key to continue.
5. Enter a logging interval using the numeric keypad, then press the
ACCEPT
soft key to continue. Valid logging interval are shown on the status bar
along the bottom edge of the display.
3240
5401
6481
10 803
12 963
15 1204
20 1606
30 2409
60 4818
* Assuming one logged channel.
Table 29 Logging Intervals vs. Total Recording Time for Each Memory Configuration*
Logging Interval
Total Recording Time (days) before memory is full with 512K Bytes of RAM
(approx. 115,630 readings)